mysqldump: Got error: 1033

[massive]

When trying to backup all users i am getting the following output :

mysqldump error output: mysqldump: Got error: 1033: Incorrect information in file: './admin_db/example.frm' when using LOCK TABLES

Any idea why?

[scsi]

Table might be damaged I would login as the admin user and go to user level then to mysql management then select that database and click the repair button at the bottom.

[massive]

Thanks for your reply scsi.
I did that from phpmyadmin but the problem was the same.

I rememberd that i have made some (untested) changes in my.cnf
I rolled them backup,restarted mysql and now everythink seems ok.